Climate change continues to have recognizable impacts across the globe, as weather patterns shift and impacts accumulate and intensify. In this wider context, urban areas face significant challenges as they attempt to mitigate dynamic changes at the local level — changes such as those caused by intensifying weather events, the disruption of critical supplies, and the deterioration of local ecosystems. One field that could help urban areas address these challenges is conservation biology. However, this paper presents the (...) argument that work in urban contexts may be especially difficult for conservation biologists. In light of current climate change predictions, conservation biology may need to abandon some of its core values in favor of commitments guiding urban ecology. More broadly, this essay aims to reconcile the goals of restoration and conservation, by reconceptualizing what an ecosystem is, in the context of a world threatened by global climate change. (shrink)

Interdisciplinarity has been a key term in the ecological debate ever since its advent in the early 1960s. The paper addresses these historical links and how the two terms ‘interdisciplinary’ and ‘ecology’ have influenced each other. The later concept ‘sustainable development’ is also truly interdisciplinary, including physical, biological, socio-economic and cultural, as well as normative, mechanisms, contexts and effects operating at scales ranging from the microscopic to the macroscopic. Policies to promote sustainable development need to be based on the (...) type of interdisciplinary thinking that has been advocated for several decades within the ecological debate. This applies not least to research into the sustainability aspects of urban development, the case discussed in this paper. Despite longstanding requests for interdisciplinarity, the development within the academic world has proceeded in the opposite direction. Many of the most influential metatheoretical perspectives virtually prohibit, or at best strongly discourage, the inclusion of insights about certain parts of reality. Here, critical realism could play a very important role as an underlabourer of interdisciplinarity. (shrink)

​This book proposes and defends the practice of urban gardening as an ecologically and socially beneficial, culturally innovative, morally appropriate, ethically uplifting, and politically incisive way for individuals and variously networked collectives to contribute to a successful management of some defining challenges of the Anthropocene – this new epoch in which no earthly place, form, entity, process, or system escapes the reach of human activity – including urban resilience and climate change.

An ecological study of the city is a new endeavor. Up to now, we have mostly been given inquiries dealing with transportation, housing, economic activity, recreational facilities, etc. All of this adds up to an attempt to reach partial solutions for problems affecting sub-systems. Urbanists and city planners have tried to reach a synthesis of these data whenever they were available.There is an ever increasing need to approach urban problems by borrowing the concepts and the methodology of ecology (...) The origins of this science stem from the research pertaining to plant and animal behavior in their natural habitat. Highly complex adaptation patterns could frequently be observed which allowed a large number of species not only to survive but also to attain a certain level of compatibility with other species. One need not be a determinist to recognize the common basis of adaptation for man and other animals and to tie together the physical and biological needs which underlie more complex individual and group behavior. Thus, for instance, von Frisch and Wilson - have recently redefined the biological bases of the noosphere. (shrink)

The author analyses an approach within the framework of urban sociology, characteristic to Chicago School. This approach combined certain biological premises in understanding the city with the typical sociological approach, seeing the city as a superorganism and a product of nature, which is why it is called the ecological theory of the city. In this regard, the connection between biology and sociology, as well as the theory of Robert Ezra Park and Ernest Watson Burgess, as typical representatives of (...) this sociological trend, will be the subject of special analysis, aiming to bring the reader closer to the ecological approach in urban sociology. The topic of particular interest is Park’s idea of the city as a product of nature, with symbiotic substructure and cultural superstructure, as well as Burgess’s idea of city growth and the theory of the concentric zones of city structure. Other issues of the ecological theory of the city were also analysed. (shrink)

This paper investigates practice, frameworks and philosophy in the field of ecological management, a novel integrative approach to closing the gap between ecological and economic theoretical models and ecological and economic behavior. First, I will present the current status in this emerging field and discuss management in relation to various sub-disciplines, including agroecology, circular economy, industrial ecology, and urban sustainability. This provides a basis to analyze the theoretical frameworks found in profitable, ecologically-based businesses and identify key general features (...) that characterize this approach, notably the relationships between: an enterprise’s diversity and its economic resiliency; zero waste policies and societal and environmental impacts; and affordances of the local environment and business’ long-term economic viability. Finally, the philosophical issues looming behind are discussed, notably problems regarding interdisciplinarity and the relation of ethical frameworks with management. Through use of the model-centered philosophy of science to disentangle some of these conceptual problems, I argue that ecological management has a unique place in sustainable development as an independent exploratory tool for constructing and testing economic and ethical models in the Anthropocene. (shrink)

This book draws on the authors' wide range of experience, to provide a greater understanding of the different dimensions of environmental engagement. It is essential reading for students, researchers, and practitioners of architecture, landscape architecture, urban planning, design and health sciences.

We set out by noting the preference for circular flows in ecological thought, and the related abhorrence of inefficiency and waste that Western ecology shares with mainstream economic thinking. This has often been manifest in a shared disdain both for uncontained, free-burning fire and for ‘unmanaged’ sexual desire. The paper constructs a ‘pyrosexual’ counter-narrative that explores the mutually constitutive and generative implication of sex and fire. Bringing together the solar ecology of Georges Bataille, feminist and queer thinking about (...) sexuality and reproduction, and a range of ways of theorising biological life and fire, we explore how fire mediates between organismic desire and the energetic dynamics of the earth and solar system. The first section takes a genealogical approach to fire and sex that traces their entanglement from the initial ‘assembling’ of fire through to the emergence of a fire-handling creature. The second section looks at how fire has been contained and intensified by human actors, and the role that heat-driven transformations of inorganic matter have played in the incitement and channeling of desire in urban spaces. The third section addresses the development of industrial ‘heat engines’ and the implications for desire and reproduction of tapping vast reservoirs of subterranean solar energy. We round off by beginning to consider what alternative possibilities might lie in the renegotiation of sex and fire on a planet undergoing rapid change. (shrink)

Living things can be classified by taxonomic similarity (lions and lynx), or shared ecological habitat (ducks and turtles). The present studies used card-sorting and triad tasks to explore developmental and experiential changes in conceptual flexibility–the ability to switch between taxonomic and ecological construals of living things–as well as two processes underlying conceptual flexibility: salience (i.e., the ease with which relations come to mind outside of contextual influences) and availability (i.e., the presence of relations in one’s mental space) of taxonomic and (...) ecological relations. We were also interested in the extent to which salience and availability of taxonomic and ecological relations predicted inductive inferences. Participants were 452 six to ten-year-olds from urban, suburban, and rural communities in New England. Across two studies, taxonomic relations were overwhelmingly more salient than ecological relations, although salience of ecological relations was higher among children from rural environments (Study 1) and those who engaged in unstructured exploration of nature (Study 2). Availability of ecological relations, as well as conceptual flexibility, increased with age, and was higher among children living in more rural environments. Notably, salience, but not availability, of ecological relations predicted ecological inferences. These findings suggest that taxonomic relations are a default way to organize intuitive biological knowledge and that environmental richness and relevant experience contribute to the salience and availability of ecological knowledge, and thereby, conceptual flexibility in biological thinking. More generally, they highlight important linkages between domain-specific knowledge and domain-general cognitive abilities. (shrink)

A largely qualitative body of literature has contributed to understanding the contradictory dimensions of community gardening as a social justice tool. Building on this literature through a city-wide, quantitative intervention, this paper focuses on community gardening as a facilitator of ecological gentrification in St. Louis, Missouri. Combining the analytical lenses of spatial justice, urban political ecology, and the rent gap theory of gentrification, I deploy spatial regression analysis to show that community gardening was positively associated with gentrification in (...) St. Louis between the years 2000 and 2010, as measured by the growth of high socioeconomic status residents in each neighborhood. This result suggests that a sociospatial dialectic exists in which the implementation of a community garden, a change in the use of urban space, leads to unintended social outcomes. Contextualizing this finding within the broader literature, I conclude that the potential of community gardening as an instrument for spatial justice is contingent on institutional support against larger-scale processes, like gentrification, that lead to spatially unjust outcomes. (shrink)

"Les fleurs, c'est ma maison, ma maison, c'est une serre ; mon enfance, c'est un jardin ; mon futur, c'est un paradis terrestre..." Chez Jean-Marie Pelt, tout ramène au jardin : le jardin de l'enfance où son grand-père lui a transmis l'amour de la nature ; le Jardin d'Eden, où il a rencontré Dieu, la ville jardin en laquelle il a transformé la ville de Metz, le jardin Terre qu'il s'est donné mission de servir... Laissez-vous guider à travers les jardins (...) de Jean-Marie Pelt et découvrez l'un des grands éveilleurs de conscience de notre temps, un homme en qui vibre L'âme de la nature. (shrink)

Although the chinampa agriculture in Mexico City is considered an historical sustainable farming system,there have been few studies on its current status. This paper assesses the relationship between agroecological factors and socioeconomic strategies by analyzing urban forces, regional employment, and environmental concerns. Despite ecological deterioration caused by the urban expansion of Mexico City, the economic viability of this agricultural system is still based on the efficient use of farming technologies and resources management strategies that tend to maintain levels (...) of productivity in horticulture and floriculture. The chinampa agriculture generates high income and employment for families and other local residents. This agroecosystem depends on the relationship between the economic priorities and agricultural criteria of farmers. We suggest that urban development, economic growth, and resource management in the chinampa region of Mexico City coincide with ecosystem processes, biological human needs, agronomic productivity, economic viability, and sociocultural values. By evaluating these factors, we provide some useful insights on the importance of this traditional agriculture within a sustainable development context. (shrink)

From one of the most influential scientists of our time, a dazzling exploration of the hidden laws that govern the life cycle of everything from plants and animals to the cities we live in. The former head of the Sante Fe Institute, visionary physicist Geoffrey West is a pioneer in the field of complexity science, the science of emergent systems and networks. The term "complexity" can be misleading, however, because what makes West's discoveries so beautiful is that he has found (...) an underlying simplicity that unites the seemingly complex and diverse phenomena of living systems, including our bodies, our cities and our businesses. Fascinated by issues of aging and mortality, West applied the rigor of a physicist to the biological question of why we live as long as we do and no longer. The result was astonishing, and changed science, creating a new understanding of energy use and metabolism: West found that despite the riotous diversity in the sizes of mammals, they are all, to a large degree, scaled versions of each other. If you know the size of a mammal, you can use scaling laws to learn everything from how much food it eats per day, what its heart-rate is, how long it will take to mature, its lifespan, and so on. Furthermore, the efficiency of the mammal's circulatory systems scales up precisely based on weight: if you compare a mouse, a human and an elephant on a logarithmic graph, you find with every doubling of average weight, a species gets 25% more efficient--and lives 25% longer. This speaks to everything from how long we can expect to live to how many hours of sleep we need. Fundamentally, he has proven, the issue has to do with the fractal geometry of the networks that supply energy and remove waste from the organism's body. (shrink)

Contemporary humanity—especially urban‐industrial civilization with its domination of nature—is disturbing complex, integrated, self‐regulating systems that have evolved over long periods of time. We are threatening not only biological ecosystems but also human self‐regulating capabilities at both the biological and the social‐systems levels. This paper presents examples of such disturbance both in the organism—respiratory‐cardiovascular problems related to environmental pollution‐and at the population level—rates of infant mortality and relations between fertility and mortality in light of economic and emotional factors. Prospects for (...) our future survival and flourishing are thus linked less to technical know‐how than to ecological understanding. (shrink)

In this paper I seek to initiate a research agenda on mega-urban airs that comprehends their atmospheres as simultaneously meteorological and affective ( McCormack, 2008 ), an agenda which seeks to apprehend megacity air/atmospheres in their vitality, corporeality and expressiveness. This paper attunes to the close and expressive substances that make up immersion in a material-affective ecology of a place, the qualities of the city that seep and imbue its material and biological fabric with affect. There is a (...) growing body of work and literature to aid us from traditions in continental aesthetic theory, French urban sociology and architecture, and an emergent cultural geographic field of atmospheric enquiry. The paper develops such an approach to megacity air in three main ways. First, air tells us about difference. In the testimony of pollutants and choking effluvium, an analysis of air reveals who belongs and who does not, who is deserving and who is not in a constellation of megacity inequality. The atmosphere puts the megacity apart from other urban and political forms. Second, closely related to the issues that circulate around a geopolitics of verticality and the technocratic security concerns of volumetric conceptions of territory, air/atmospheres constitute an environmental ecology of security threats and crisis that thwart megacity life and justify environmental policies as ‘security’ (see Zeiderman, 2013). Third, the paper argues how megacities are increasingly productive of secessionary atmospheres, often by removal and exclusion, which are not entirely separate from other atmospheric security concerns. (shrink)

One of the greatest challenges for Latin America and the Caribbean, the most biologically and culturally diverse region in the world, is to halt the loss of species caused by habitat destruction and land degradation. Up to now, setting aside protected natural areas is con­sidered the most effective alternative to conserve biodiversity. Protected areas, however, are under increasing assault by agricultural, silvicultural, and industrial development that surround and isolate them, reducing their habitat quality at the landscape scale. Among the different (...) types of protected areas that have been proposed, biosphere reserves stand out for their attempt to compatibilize social development and conservation. Their management is the most amenable to integration of natural and human disturbance, inclusion of traditional management techniques, and participation by social and economic sectors in the administration. Biosphere reserves have proliferated all over the world, and today there are 531 of them located in 105 countries, where they protect vast ecological and cultural diversity. Even though the design of biosphere reserves is based on the landscape concept, it has yet to take into account ecosystem scales, possible long-term effects of disturbances, and better integrate and give higher consideration to the knowledge and experience of numerous ethnic groups that live within them. However, doing so requires a transformation of the function of the core, buffer, and transition areas. The current design of biosphere reserves is centripetal because the main function of the buffer zone is to protect biodiversity in the core. We pro­pose a centrifugal model, where biodiversity of the core spreads freely toward the area of greater human influence with the buffer zone functioning as a connector. This connectivity can promote land-use practices that are in alignment with both ecosystems functioning and biodiversity conservation in natural, semi-natural, urban and industrial landscapes. (shrink)

Carey's book on conceptual change and the accompanying argument that children's biology initially is organized in terms of naïve psychology has sparked a great detail of research and debate. This body of research on children's biology has, however, been almost exclusively been based on urban, majority culture children in the US or in other industrialized nations. The development of folkbiological knowledge may depend on cultural and experiential background. If this is the case, then urban majority culture (...) children may prove to be the exception rather than the rule, because plants and animals do not play a significant role in their everyday life. Urban majority culture children, rural majority culture children, and rural Native American children were given a property projection task based on Carey's original paradigm. Each group produced a unique profile of development. Only urban children showed evidence for early anthropocentrism, suggesting that the co-mingling of psychology and biology may be a product of an impoverished experience with nature. In comparison to urban majority culture children even the youngest rural children generalized in terms of biological affinity. In addition, all ages of Native American children and the older rural majority culture children gave clear evidence of ecological reasoning. These results show that both culture and expertise play a role in the development of folkbiological thought. (shrink)

During our current free market era, a prevailing utilitarian ethics centered on monetary cost benefit analyses continues overriding incessantly a plethora of diverse forms of ecological knowledge and ethics present in the communities of South America, and other regions of the world. For the first time in human history, more than 50% of the world’s population lives in cities, and speaks only one of eleven dominant languages, loosing contact with the vast biodiversity and the 7,000 languages that are still spoken (...) around the planet. This global urban enclosure and biocultural homogenization generates physical barriers and conceptual barriers that hinder the understanding of the inextricable links between the habitats of a region, the inhabitants and their habits. However, these vital links are acutely recognized in at least three families of worldviews: contemporary ecological sciences, ancestral Amerindian ecological knowledge, and Western pre-Socratic philosophical roots expressed in the archaic meaning of ethos, and ethics. South American post-Columbian history shows that large-scale exploitation, as well as monocultures that replace native habitats, have been repeatedly associated with ephemeral economic booms that left behind degraded social and ecological environments. A historical analysis of post-Columbian Chile illustrates how a unique mosaic of ecosystems and biological species, cultures, and languages have been progressively replaced by a few biological species and a uniform language and culture. These biocultural homogenization processes are the outcome of a violent conquest, overpowering the resistance of local inhabitants, and today’s scale of violent suppression of biological and cultural diversity is greater than ever. Instead of a post-colonial period we are living in the middle of an ultra-colonial era. To counterbalance these trends, at the southern end of the Americas, through inter-institutional and international collaborations led by the Chilean University of Magallanes and the Institute of Ecology and Biodiversity and the University of North Texas in the US, we developed a methodological approach that we call “field environmental philosophy.". (shrink)

The discussion of the Anthropocene makes it clear that contemporary social thought can no longer take nature, or an external ‘environment’, for granted in political discussion. Humanity is remaking its own context very rapidly, not only in the processes of urbanization but also in the larger context of global biophysical transformations that provide various forms of insecurity. Disasters such as the Fukushima nuclear meltdowns and potentially disastrous plans to geoengineer the climate in coming decades highlight that the human environment is (...) being remade in the Anthropocene. Humanity is now a geological actor, not just a biological one, and that insight, captured in the term Anthropocene, changes understandings of both security and environment in social thought, requiring a focus on production of environments rather than their protection. Disasters help clarify this key point and its significance for considering geosocial formations. (shrink)

This book provides insight into the work of Oswald Spengler (1880-1936), one of the most prophetic minds of the 20th century, whose dire historical predictions - world wars, ecological disasters, gigantic cities with unrestrained urban sprawl, increasing race conflicts, failure of nerve among the ruling elites, and rapid decline of cultural norms - have more than passed the test of time. Besides focusing on Spengler the prophet and the controversies which surrounded his name in the 1920s, this book also (...) emphasizes Spengler's pioneering role in the development of a comparative study of cultures based on biological principles. (shrink)

Recent advances in molecular genetics, plant physiology, and biochemistry have opened up the new biotechnology of herbicide resistant crops (HRCs). Herbicide resistant crops have been characterized as the solution for many environmental problems associated with modern crop production, being described as powerful tools for farmers that may increase production options. We are concerned that these releases are occurring in the absence of forethought about their impact on agroecosystems, the broader landscape, and the rural and urban economies and cultures. Many (...) of the benefits and risks associated with HRCs are not apparent to either the public, farmers, policy makers, or the scientific community. HRC technology raises moral issues in three areas: our duties toward the natural environment; our political and economic responsibilities to each other; and our communal character as one generation among many. We also need a rational basis on which to make evaluations of this new biotechnology. The technical aspects of their release require a logical guide to the ecological, environmental, and biological effects the release might have in sustainable agroecosystems. The initial step should include an assessment of the intrinsic qualities of the crop, the herbicide, and the resistance mechanisms. The second step should include an assessment of effects associated with population ecology, population genetics, environmental degradation, consumer health, and farm economic viability due to the resistant crop-herbicide pair. Herbicides have been used in crop production for nearly a half a century. There has been a tremendous increase in the use of these chemicals in that time. Society has seen the use of these chemicals not only help to feed many people, but also to bring costs not anticipated before the introduction of the chemicals. We need to draw on that long history of use and learn the lessons it can provide us as we approach the introduction and commercialization of the next generation of weed control technology, herbicide resistant crops. We also need to reflect on the lessons we missed during that half century because we spend more time imagining the possible benefits that would come from the technology than scrutinizing the possible harm. (shrink)

N. Katherine Hayles is known for breaking new ground at the intersection of the sciences and the humanities. In Unthought, she once again bridges disciplines by revealing how we think without thinking—how we use cognitive processes that are inaccessible to consciousness yet necessary for it to function. Marshalling fresh insights from neuroscience, cognitive science, cognitive biology, and literature, Hayles expands our understanding of cognition and demonstrates that it involves more than consciousness alone. Cognition, as Hayles defines it, is applicable (...) not only to nonconscious processes in humans but to all forms of life, including unicellular organisms and plants. Startlingly, she also shows that cognition operates in the sophisticated information-processing abilities of technical systems: when humans and cognitive technical systems interact, they form “cognitive assemblages”—as found in urban traffic control, drones, and the trading algorithms of finance capital, for instance—and these assemblages are transforming life on earth. The result is what Hayles calls a “planetary cognitive ecology,” which includes both human and technical actors and which poses urgent questions to humanists and social scientists alike. At a time when scientific and technological advances are bringing far-reaching aspects of cognition into the public eye, Unthought reflects deeply on our contemporary situation and moves us toward a more sustainable and flourishing environment for all beings. (shrink)

Power-law city-size distributions are a statistical regularity researched in many countries and urban systems. In this history of science treatise we reconsider Felix Auerbach’s paper published in 1913. We reviewed his analysis and found (i) that a constant absolute concentration, as introduced by him, is equivalent to a power-law distribution with exponent $$\approx 1$$ ≈ 1, (ii) that Auerbach describes this equivalence, and (iii) that Auerbach also pioneered the empirical analysis of city-size distributions across countries, regions, and time periods. (...) We further investigate his legacy as reflected in citations and find that important follow-up work, e.g. by Lotka (Elements of physical biology. Williams & Wilkins Company, Baltimore, 1925) and Zipf (Human behavior and the principle of least effort: an introduction to human ecology, Martino Publishing, Manfield Centre, CT (2012), 1949), does give proper reference to his discovery—but others do not. For example, only approximately 20% of city-related works citing Zipf (1949) also cite Auerbach (Petermanns Geogr Mitteilungen 59(74):74–76, 1913). To our best knowledge, Lotka (1925) was the first to describe the power-law rank-size rule as it is analyzed today. Saibante (Metron Rivista Internazionale di Statistica 7(2):53–99, 1928), building on Auerbach and Lotka, investigated the power-law rank-size rule across countries, regions, and time periods. Zipf’s achievement was to embed these findings in his monumental 1949 book. We suggest that the use of “Auerbach–Lotka–Zipf law” (or “ALZ-law”) is more appropriate than “Zipf’s law for cities”, which also avoids confusion with Zipf’s law for word frequency. We end the treatise with biographical notes on Auerbach. (shrink)

Social movements are using education to generate critical consciousness regarding the social and environmental unsustainability of the current food system, and advocate for agroecological production. In this article, we explore results from a cross-case analysis of six social movements that are using education as a strategy to advance food sovereignty. We conducted participatory research with diverse rural and urban social movements in the United States, Brazil, Cuba, Bolivia, and Mexico, which are each educating for food sovereignty. We synthesize insights (...) from critical food systems education and the political ecology of education in analyzing these cases. We compare the thematic similarities and difference between these movements’ education initiatives in terms of their emergence, initial goals, expansion and institutionalization, relationship to the state, theoretical inspirations, pedagogical approach, educational topics, approach to student research, and outcomes. Among these thematic areas, we find that student-centered research on competing forms of production is an integral way to advance critical consciousness about the food system and the political potential of agroecological alternatives. However, what counts, as success in these programs, is highly case-dependent. For engaged scholars committed to advancing education for food sovereignty, it is essential to reflect upon the lessons learned and challenges faced by these movements. (shrink)

Interaction between humans and cats in urban environments is subject to dynamic change. Based on the frequency and quality of relations with humans, we can distinguish several populations of domestic cats : pedigree, pet, semi-feral, feral, and pseudo-wild. Bringing together theoretical perspectives of the Tartu school of biosemiotics and ethological studies of animal societies, we distinguish two basic types of cat cultures: the culture of street cats and the humano-cat culture of pets. The difference between these cultures is documented (...) on the level of zoosemiotic interactions, ecological relations, and human representations. We introduce a threefold model of human-animal interactions in urban environments which steer a careful course between the Scylla of realistic ontology and the Charybdis of social constructivism. A case study on Estonian cat shelters illustrates the significance of cultural representations and institutionalized actions in human-cat cohabitation. (shrink)

The growing academic literature on ‘food sovereignty’ has elaborated a food producer-driven vision of an alternative, more ecological food system rooted in greater democratic control over food production and distribution. Given that the food sovereignty developed with and within producer associations, a rural setting and production-side concerns have overshadowed issues of distribution and urban consumption. Yet, ideal types such as direct marketing, time-intensive food preparation and the ‘family shared meal’ are hard to transcribe into the life realities in many (...) non-rural, non-farming households, and it is unclear, in turn, how such realities can fit into models of food sovereignty. A particular practical and research gap exists in how to engage the overwhelming need for food options served under time constraints and (often) outside of the home or a full-service restaurant. The over-generalized vilification of ‘fast food’ should be replaced by a framework that allows us to distinguish between unhealthy, corporate fast foods and both traditional and emerging alternatives that can serve to extend the tenets of food sovereignty further into food processing, distribution and consumption. This article analyzes existing conceptualizations of fast food, explores fast food historically, and studies how food sovereignty can operationalize its tenets and priorities in situations where fast food is an unquestionable necessity. (shrink)

Extractive foraging tasks, such as digging, are broadly practiced among hunter-gatherer populations in different ecological conditions. Despite tuber-gathering tasks being widely practiced by children and adolescents, little research has focused on the physical traits associated with digging ability. Here, we assess how age and energetic expenditure affect the performance of this extractive task. Using an experimental approach, the energetic cost of digging to extract simulated tubers is evaluated in a sample of 40 urban children and adolescents of both sexes (...) to measure the intensity of the physical effort and the influence of several anatomical variables. Digging is a moderately vigorous activity for inexperienced girls and boys from 8 to 14 years old, and it requires significant physical effort depending on strength and body size. However, extracting subterranean resources is a task that may be performed effectively without previous training. Sex-specific and age-specific differences in the net energy expenditure of digging were detected, even though both sexes exhibited similar proficiency levels when performing the task. Our results highlight that both boys and girls spend considerable energy while digging, with differences largely driven by body size and age. Other factors beyond ability and experience, such as strength and body size, may influence the proficiency of juveniles in performing certain physically intensive foraging tasks, such as gathering tubers. (shrink)

Habitat fragmentation produces isolated patches characterized by increased edge effects from an originally continuous habitat. The shapes of these patches often show a high degree of irregularity: their shapes deviate significantly from regular geometrical shapes such as rectangular and elliptical ones. In fractal theory, the geometry of patches created by a common landscape transformation process should be statistically similar, i.e. their fractal dimensions and their form factors should be equal. In this paper, we analyze 49 woodlot fragments (Pinus sylvestris L.) (...) in the Belgian Kempen region to study the direct relationship between a transformation process and the concomitant patch geometry. Although the fractal dimension of the woodlots is scattered (i.e. they are not statistically similar), the perimeter-area relation of the fragments is characterized by a single, ‘dimension-like’ exponent. This exponent suggests a certain shape homogeneity among the patches, which is confirmed by the absence of hierarchical levels associated with sharp increases of the fractal dimension at scale transitions. The interaction of different natural (soil factor, vegetation type) and anthropogenic (afforestation, urbanization) processes during patch development is assumed to have generated this feature. Comparison of the area and perimeter fractal dimension with an ecological index for habitat quality, the interior-to-edge ratio, shows that the fractal dimension is suitable for predicting interior habitat presence, which is more likely for patches with smooth perimeters and compact areas. The ratio of the area to the perimeter fractal dimension confirms this observation, with high values for high interior-to-edge ratios, characteristic for regularly shaped patches. (shrink)

The Environmental Uncanny argues that the increasing destitution of our world is the result of a certain forgetfulness: we have forgotten that the basis of our knowledge is not calculative reason, but our participation in the natural world. Offering a unique interdisciplinary perspective on the global environmental crisis - ranging from traditional phenomenology, including substantial discussion of both Merleau-Ponty and Heidegger, to philosophy of biology, to architectural and urban design theory, to landscape photography, this book makes illuminating connections (...) to paint a multifaceted picture. (shrink)

This article discusses the history of rabies in South Africa since the early twentieth century. It argues that rabies is a zoonotic disease that traverses rural and urban spaces, that transfers itself between wild and domestic animals and remains a potential threat to human life in the region. Scientists discovered an indigenous form of rabies, found primarily in the yellow mongoose, after the first biomedically confirmed human fatalities in 1928. Since the 1950s canine rabies, presumed to have moved southwards (...) from across the Zambezi River, has become endemic also. South Africa is home to a comparatively large number of rabies strains and animal carriers, making it a particularly interesting case study. Environmental changes during the colonial and apartheid periods have helped to explain the increase in rabies cases since the midtwentieth century. Moreover, developments in the biological and ecological sciences have provided insights into why the rabies virus has become endemic in certain wildlife species. (shrink)